DystociaParityPregnancyPlacenta, RetainedCattle DiseasesCesarean SectionFreemartinismUterine InertiaLabor, InducedBreedingLabor PresentationPelvimetryPelvisBirth WeightDelivery, ObstetricShoulderTrial of LaborFetal DistressBreech PresentationLabor, ObstetricCattleAnalgesia, ObstetricalFetal MacrosomiaMenstruation-Inducing AgentsPregnancy OutcomeBirth InjuriesObstetric Labor ComplicationsFetal MonitoringLeast-Squares AnalysisAnalgesia, EpiduralReproductionPregnancy, MultipleTwinsDiabetes, GestationalFrontal BoneFetal Viability